Quick answers
- Is CVE-2026-124560 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-124560 being exploited in the wild.
- How severe is CVE-2026-124560?
- Critical severity, with a CVSS score of 9.8, published 9 November 2026.
- Which products and versions are affected?
- D-Link DIR-878 1.20B05.
- Is there a fix for CVE-2026-124560?
- No fixed version is recorded yet. Do not expose the router to untrusted networks; restrict administrative access via firewall rules and disable remote management features if not required. However, since this product is end-of-life, replacement with a supported device is strongly recommended. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-124560 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-124560?
- Check whether you run D-Link DIR-878 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
Do not expose the router to untrusted networks; restrict administrative access via firewall rules and disable remote management features if not required. However, since this product is end-of-life, replacement with a supported device is strongly recommended.
Technical details
A heap-based buffer overflow exists in the GetCAPTCHAsetting function within bin/prog.cgi when processing the uid argument via the HNAP Handler. The vulnerability is reachable remotely without authentication and can be exploited to achieve arbitrary code execution. Public exploit code is available, though no active wild exploitation has been reported yet.
Affected products
- D-Link DIR-878 1.20B05
Timeline
- 2026-11-09: disclosed